Improvement in reversible knob-latches



UNITED STATES PATENT CFFICE.

SAMUEL A. WILFORD, OF NORWVICH, CONNECTICUT, ASSIGNOR TO NORWVICHLOCK-MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT IN REVERSIBLE KNOB-L ATCHES.

Specification forming part of Letters Patent No. 148,792, dated March17, 1874 application filed January 13, 1874.

To all whom it may concern:

Be it known that I, SAMUEL A. WILEORD, of Norwich, county of New London,State of Connecticut, have invented certain Improvements in ReversibleKnob-Latches, of which the following is a specification:

The accompanying drawings show the adjustment and operation of the latchmechanism for the purposes described, severally, in each of the twoforms of lock or latch in common use, one of which it is customary tomortise into the stile of the door, the other to affix upon it withscrews.

In the accompanying drawings, A represents a lock or latch case of theordinary style with cover removed. B is the latch-bolt, the tail ofwhich is swiveled, as shown in dotted lines at C, to the extension D,thus enabling it to turn therein for the purpose of reversion, to adaptit to a right and left hand door, when extended by the thumb and finger,as hereinafter described.

The so-called. swivel C may be otherwise described as a hole perforatedthrough a shoulder in the extension D of the latch-bolt.

The bolt-tail and its extension D may bemade relatively longer orshorter, according to the shape of the latch or lock case.

E is a lever, pivoted at its lower end to the eXtensionD, and at or nearthe center to the yokeF; and, also, at its upper end,to the movableslide G, the yoke F being made and operated by the hub H, in the usualmanner.

The spring I, which has its bearing at one end in the rear of thelock-case, and at the other upon the lever E, serves the double purposeof pushing the latch-bolt into position when withdrawn by the ordinaryaction of the knob upon the hub H when in use upon the door, and ofregulating the movement of 'the slide G whenthe latch-bolt is withdrawnfor the purpose of reversion.

The slide G is heldin place, when the latch or look is upon the door,either by one of the screws which fasten the latch or look to the door,as in Figs. 1 and 3, or by a slide, K,

having a projection which bears against a shoulder on slide Gr, as inFigs. 2 and 4, or any other adjustable bearin g. V

I am aware that the use of a pivoted lever, either in front or rear ofthe hub H, is not new. By its combination, however, with other parts notheretofore employed, I secure a reversible latch simpler and muchcheaper of con struction than most now in use, and. of great durability.

hat I claim is The lever E, pivoted to the slide G, yoke F, andreversible latch-bolt B D, in combination with the stop K, or itsequivalent, all constructed and arranged substantially as described.

SAMUEL A. IVILFORD.

Witnesses:

G. C. TURNER, C. H. BROWN.

